76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
|
/*
|
||
|
|
* ALSA interface to ivtv PCM capture streams
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
|
||
|
|
* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
* 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct snd_card;
|
||
|
|
|
||
|
|
struct snd_ivtv_card {
|
||
|
|
struct v4l2_device *v4l2_dev;
|
||
|
|
struct snd_card *sc;
|
||
|
|
unsigned int capture_transfer_done;
|
||
|
|
unsigned int hwptr_done_capture;
|
||
|
|
struct snd_pcm_substream *capture_pcm_substream;
|
||
|
|
spinlock_t slock;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern int ivtv_alsa_debug;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* File operations that manipulate the encoder or video or audio subdevices
|
||
|
|
* need to be serialized. Use the same lock we use for v4l2 file ops.
|
||
|
|
*/
|
||
|
|
static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
|
||
|
|
{
|
||
|
|
struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
|
||
|
|
mutex_lock(&itv->serialize_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
|
||
|
|
{
|
||
|
|
struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
|
||
|
|
mutex_unlock(&itv->serialize_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define IVTV_ALSA_DBGFLG_WARN (1 << 0)
|
||
|
|
#define IVTV_ALSA_DBGFLG_INFO (1 << 1)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
|
||
|
|
do { \
|
||
|
|
if ((x) & ivtv_alsa_debug) \
|
||
|
|
pr_info("%s-alsa: " type ": " fmt, \
|
||
|
|
v4l2_dev->name , ## args); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
|
||
|
|
IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
|
||
|
|
IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_ERR(fmt, args...) \
|
||
|
|
pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_WARN(fmt, args...) \
|
||
|
|
pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
|
||
|
|
|
||
|
|
#define IVTV_ALSA_INFO(fmt, args...) \
|
||
|
|
pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
|